Basic knowledge of CNC machine tool fixtures for precision parts processing

Precision part processing clamping tool refers to a device that is installed on the machine tool to clamp the workpiece or guide the tool so that the workpiece and the tool have the correct mutual positional relationship.

1. Composition of CNC machine tool fixtures:

According to its function and function, the CNC machine tool fixture can usually be composed of several parts such as positioning element tightening device, installation coupling element and clamp.

The positioning element is one of the main positioning elements of the fixture, and its positioning accuracy will directly affect the precision of precision parts processing. Commonly used positioning elements include V-shaped blocks, positioning pins, positioning blocks, etc.

The function of the tightening device is to maintain the original position of the workpiece in the fixture, so that the workpiece does not change the original position due to external forces during processing.

The connecting element is used to determine the position of the fixture on the machine tool, so as to ensure the correct processing position between the workpiece and the machine tool. The clamp is the basic part of the clamp, which is used to connect various components or devices on the clamp to make it a whole, so as to ensure that the workpiece processed by the precision parts has better accuracy and rigidity.

  2. The basic requirements of CNC machine tool fixtures:

  (1) Accuracy and stiffness requirements.

  (2) Positioning requirements.

  (3) Openness requirements.

  (4) Quick clamping requirements.

  (5) Easy chip removal.